Carborundo cement.



COMPOSITIONS,

of carbon. ninety to sixty; refractorv clav ten to forty; lime naught to four; rim-ate of thoroughly mixed and finely ground are dr ied,

. UNITED STATES Reference Patented September 20, 1904.

PATENT ()FFIcE.

LOUIS EMILE MULLER, DI'I LOUIS DEMILE MULLER, OF PARIS, FRANCE.

CARBORUNDO QEMENT SPECIFICATION forming part of Letters Patent No. 770,730, dated September 20, 1904.

Application filed July 12, 1904. Serial No. 216,283. (No specimens.)

T0 (LIZ-whom it may concern:

Be it known that I, LOUIS EMILE MULLER,

dit LOUIS DEMILE MULLER, of Paris, France, have invented a new and useful Pulverulent Substance Called Carborundo Cement, which invention is fully set forth in the following specification. This invention relates to the preparation of a composition of matter which I call carborundo cement, designed to form at once when mixed with water a paint, mortar, or coating to be applied to the surface of walls or materials serving for the construction of fireplaces, furnaces, ducts, retorts, receptacles, or on any coatings to protect them against the action of fire, hot gases, acid, and corrosive substances.

In making my product I add to the silicide of carbon or carbid of silicium various substances which are chosen according to the kind of application to be made with the product or the nature of destructive action to avoid.

I will describe as an example two different ways of eifecting my new product. The ingredients may be taken either by weight or by volume.

If designed to be applied on the Walls of a urnace in order to preserve the more or less refractory brickwork, the mixture or product will be composed as follows: silicide aniit such as sodium or go e, twenty to fifty. esesu assium, Jstances then ground again in @331 'to destroy any agglomei ati o n "resulting from the drying. To make use of this pulverulent powder, it is only necessary to dilute the same with water in a suitable proportion, so as to obtain, as the case may be, a kind of liquid or semiliquid paint or else a real mortar or cement. Moreover, the said product may be used as a badigeon or still as a plaster to be applied 0?; I with the trowel or a grout to join the said parts to be preserved.

If it is desired to avoid the action of chemica s, I make other mixtures, the proportions varying within certain limits in the following FXAMINER manner: silicide of carbon or carborundu fifty to eighty-five; calcined ma nesia or ma nesite live to fifteen; fin e s'zinr,"ten to twenty-five. These materialfifrealso ground very finely, and the mixture thus obtained is tempered" with saturated chlorid of magne- .a--"" ;.ur----u It will be understood that the nature of the substances mixed with the carborundum may vary as well as the nature of the tempering liquid, for it depends both upon the physical or chemical action which it is desired to avoid and upon the reactions which will determine the sticking of the coating on the materials to be protected.

In using the mixture No. 1 it is only necessary to dilute the carborundo cement with pure water, and the fire completes the reaction in melting the silicate and bringing the coating to the state of a regular protective glazing. I/Vith the mixture No. 2 it is not necessary to use the action of the fire, the reaction of the chlorid of magnesium on the magnesia producing immediately the hardening, and consequently the adhesion.

Oarborundum or silicide of carbon can be replaced by similar compounds obtained by all smelting in the electric furnace, such as mecarbids or borones may e produced on the spot, and thus ad hereto the material to protect.

I claim 1. A composition of matter in a pulverulent condition containing silicide of carbon, and a binding and hardening agent consisting of refractory clay, an alkali silicate and lime.

2. A composition of matter in pulverulent *treafiese 'In o't hm cases the oxychloridsfi containing carborundum or other meta 1c" condition containing silicide of carbon and a In Witness whereof I have hereunto signed IO binding and hardening agent consisting of remy name in the presence of two subscribing fractory clay and a silicate of an alkali metal witnesses.

and lime.

b. A composition of matter in pulverulent condition containing silicide of carbon and a binding and hardening agent consisting of refractory clay and silicate of sodium and nne.

LOUIS EMILE MULLER, DIT

LOUIS DEMILE MULLER.

W'itnesses:

HANSON C. CORCE, J ULES ARMENGAUD, J eune. 

